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MB Quart OWC304

175W 12" Onyx Series Dual 4 ohm Subwoofer

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List price $109.99

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$39.99

with warranty

Order within 85 hrs to ship 5/26

Arrives by Thursday, May 28 to zip 20147

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In Stock

Arrives by Thu, May 28

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General Features:

  • 12" Dual 4 Ohm Onyx Series Subwoofer
  • Power Handling:
    • Peak: 350 watts
    • RMS: 175 watts
  • Impedance: 4 ohms
  • Injection molded polypropylene cone
  • UV Resistant butyl rubber surround
  • Deep drawn heavy gauge stamped steel basket
  • Heavy duty textured powder coat finish
  • Red treated Nomex spiders
  • Push & Insert Style speaker terminals
  • Anti-resonant magnet cover
  • 1.5" High temperature aluminum voice coil
  • Heat-dispersing vented pole plate
  • Frequency response: 35-250 Hz
  • Resonance Frequency (Fs): 30 Hz
  • Sensitivity: 84.6 dB
  • Top-mount depth: 6-1/16"
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Product History:

MB Quart OWC304 thumbnail
(newest, current model)
MB Quart ONX304 thumbnail
(previous model, replaced by MB Quart OWC304)

Subwoofer Specifications

Subwoofer Series
Each subwoofer manufactured is part of a series. This is the name of the subwoofer's series.
ONYX (MB Quart)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
12"
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
350 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
175 watts
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
Dual
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
4 ohms
Voice Coil Diameter
Diameter of voice coil, usually measured in inches.
1.5"
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Round / Circle
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Black
Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Injection Molded Polypropylene (IMPP)
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Butyl Rubber
Subwoofer Grille
Most subwoofers are able to accommodate a universal grille; however, some subs include a grille and others have a specific, optional grille available for purchase separately. If "yes", then the subwoofer includes a grille. If "optional (sold separately)" the matching grille will need to be purchased in addition to the sub.
No
Re-Cone Kit Available
Some higher end subwoofers have replaceable cone assemblies. In case of a blown woofer, a recone kit allows for a simple replacement, as opposed to purchasing an entire new subwoofer.
No

Recommended Enclosure Specifications

Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Ported / Vented
Sealed
Optimum Sealed Box Volume
This value indicates the ideal sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.25 cubic feet
Minimum Ported Box Volume
This value indicates the minimum ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
1.8 cubic feet
Optimum Ported Box Volume
This value indicates the ideal ported box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
2.5 cubic feet
Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
5-1/4"
Cutout Diameter
The actual diameter of the hole you will need to cut out if you are creating a new mounting location for this speaker, or if you are mounting a subwoofer in a box.
10-3/4"
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

No

Electromechanical Parameters

Equivalent Compliance (Vas)
This is the amount of air that has the same stiffness as the subwoofers suspension. The greater the rating, the lower the stiffness and larger recommended enclosure. It is measured in Liters.
99.286 liters
Total Speaker Q Value (Qts)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including all dimensionless losses. Essentially, a high Qts value (closer to 1.0) means the subwoofer is great for sealed enclosures and a low Qts value (closer to 0) means the woofer is great in vented enclosures. A Qts of around 0.45 means the woofer will work decently in either enclosure type.
1.015
Electrical Q Value (Qes)
The subwoofers relative damping (Q) at the resonance frequency (Fs), including electrical losses. Also called the mechanical damping of the subwoofer. The unitless measurement usually varies from 0.5 10.
1.475
Electrical Resistance of Voice Coil (Re)
Amount of DC resistance of the subwoofer when measured with an ohm meter. Typically, this will read less than the impedance rating of the subwoofer.
8.16 ohms
Mechanical Q Value (Qms)
This is the subwoofers relative damping (Q) at the resonance frequency (Fs), including mechanical losses. Also called the mechanical damping of the subwoofer. This unitless measurement usually varies from 0.5 10.
255.83

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
73%
4 Star
9%
3 Star
9%
2 Star
0%
1 Star
9%

Average Attribution Rating

Durability
4.5
Value
4.9
Features
4.5
Design
4.9
Usability
4.9
Stevedastar

NY Jamaica

Overall
Durability
Value
Features
Design
Usability
MB quart 12" sub

February 8, 2015

It bump... Its worth the money.facts
Its strong enuff for my setup and I have a tendency to push amps to its limits.
Very happy with this buy.
I made a good choice .I think
Sonicelectronix.com
For all ya car audio video needs try em out.

24 of 40 found this helpful

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david

queen creek, AZ

Overall
Durability
Value
Features
Design
Usability
Thing pounds!!!

January 27, 2014

Mb Quart makes some quality sound I love the way this sub sounds and looks. If your looking for clean bass for a reasonable price look no further. Sonic is the best!

33 of 61 found this helpful

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nu fan

omaha ne

Overall
Durability
Value
Features
Design
Usability
great sq sub at great price

April 17, 2014

Didn't think it would sound as Google as it does.
Sounds great and has low bass and best in 1.25 ft box
Running a Boston 250w amp no problem.

33 of 62 found this helpful

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bigb

berwick, louisiana

Overall
Durability
Value
Features
Design
Usability
Brei from louisiana

January 19, 2015

I love this sub I only have one bc I was on a budget I have it running on a 400 watt power acoustik amp and it sounds amazing I can't turn my amp up all the way or I'll blow it soon but it rattles the inside of my car I love this sub I will be buying mb quart subs again and thanks sonicelectronix for the great prices I always recommend you guys for myself and all my friends looking for car audio for cheap so thanks you guys.

28 of 53 found this helpful

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jimmyjames

Cookeville, TN

Overall
Durability
Value
Features
Design
Usability
great price and super clean sound

March 17, 2014

these subs sound very clean and are a great price, BUT they dont hit as "hard" as other subwoofers. if your looking for a good clean balanced sound then these are a great choice. but if your looking rattle your car apart these dont quite do it. they dont the really the deep bass that other 12s do.

29 of 56 found this helpful

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Claire

Sandy, UT

Overall
Durability
Value
Features
Design
Usability
Awesome Sub

January 6, 2014

These pack a hell of a punch when you blast them. These match up with my system perfectly. For how much it costs, I can't complain. My friends think I spent over 500 bucks doing up the sub but I spent a lot less. Pair this up with a sufficient class D or cheap class A/B amp and you're good to go.

27 of 52 found this helpful

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Ryan

LEHT, NJ

Overall
Durability
Value
Features
Design
Usability
Good Sub

March 8, 2015

Good sounding sub. Not a SPL sub nor do they hit the lows. They sound better in pairs. If you need musical bass to fill the lower octaves at a great price, get these. Great value, no regrets.

16 of 32 found this helpful

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Eboogie

Verona, NJ

Overall
Durability
Value
Features
Design
Usability
Great Speakers

March 10, 2015

Awesome speakers for the price! Would recommend and would buy again.

14 of 30 found this helpful

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michael

Rancho Cucamonga, CA

Overall
Durability
Value
Features
Design
Usability
impressive

June 3, 2014

I didn't think that these would sound as good as they do. I have them in a 2.50 sealed box. it is very responsive

23 of 49 found this helpful

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G unit

Phoenix Arizona

Overall
Durability
Value
Features
Design
Usability
MB quarts 12 inch sub

April 3, 2015

This speaker is not MB quarts quality I blew the speaker off of the punch 200 amplifier. Now I just have a blown speaker

8 of 22 found this helpful

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Mike

Ramsey, MN

Overall
Durability
Value
Features
Design
Usability
Great subs

November 11, 2014

These are great sounding sub's have 4 running in my tuck with mb 1000 watt amp running at 2ohms hit very hard for such low wattage sub's love them

27 of 65 found this helpful

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Accessory Tools and Products

Accessories added

Single 12" Subwoofer Angled Truck or Hatchback Box Enclosure

CARB Compliant, 5/8" MDF Shallow Sub Enclosure Lined with Polyfil.

Your Price $29.99

Single 12" Venteded MDF Subwoofer Enclosure

12" Vented 3/4" MDF Enclosure Lined w/ Polyfil.

Your Price $54.99

25 ft. of Streetwires 12 Gauge Speaker Cable

You'll need speaker wire to hook up that new subwoofer!

Your Price $44.95

Belva 23 ft. of 12 Gauge Speaker Wire

Ultra-flexible PVC blended jacket for easy installation.

Your Price $14.99

20 Square Feet of Sound Dampening Material

NVX Sound dampening is thicker than competitors, eliminates rattles and gives you bigger bass!

Your Price $59.99

Dynamat Sound Dampening Trunk Kit

Did you know sound dampening will reduce those annoying rattles and even increase your SPL?

Your Price $94.95

Stinger Sound Dampening Trunk Kit

Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for your whole trunk!

Your Price $69.99

12 oz. Can of Adhesive Spray

Spray adhesive used for adhering carpet to subwoofer boxes without bubbles.

Your Price $6.99

40" x 15 Ft Piece of Premium Un-Backed Automotive Trim Carpet

Durable design for long life-span, available in many colors and shades.

Your Price $39.99

Gold Plated Dual Terminal Banana Plug Connector

Enables an expandable, secure connection accepting up to 8 gauge wire.

Your Price $1.99

Car Stereo and Speaker Installation Tool Kit

Includes Test Light, Crimp/Splice Tool, Multi-bit Screwdriver and more.

Your Price $16.99

Xscorpion 9-Piece Nylon Plastic Pry and Chisel Tool Set

Easily removes dash/trims, door clips, panels and pins, rubber grommets and vehicle emblems.

Your Price $14.99

Cordless Multi-Functional Heat Tool Soldering Iron Kit

Continuous working lock allows you to work without holding down trigger.

Your Price $79.99

4 Ft of 1/4" Thick Black Heat Shrink Tubing

Provides abrasion resistance and added protection for your cables.

Your Price $3.99

1mm All Purpose Solder

Solder is all purpose for use on most projects where solder is needed.

Your Price $8.99

Universal 12" Subwoofer Grille

Keep your subwoofer safe from accidental damages with this amazing grill.

Your Price $19.95

12" Protective Waffle Subwoofer Grille

Keep your subwoofer looking amazing while keeping it safe.

Your Price $4.99

1 MB Quart OWC304 Subwoofer

Mono Amp

2 Channel Amp - Bridged

2 MB Quart OWC304 Subwoofers

Mono Amp

Mono Amp - Option 1

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp - Bridged

3 MB Quart OWC304 Subwoofers

Mono Amp

4 Channel Amp

4 MB Quart OWC304 Subwoofers

Mono Amp

2 Channel Amp

2 Channel Amp - Bridged

4 Channel Amp

Browse 3 questions and 14 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
Amazing product at a great price
Xavier y on Feb 12, 2015
On sale and is a brand name.
Gary F on Jan 19, 2015
Value and reviews
Russell O on Feb 3, 2015
GOOD REVIEWS AND A CHEAP PRICE.WOOFER IS DUAL VOICE COIL ALSO .
jason h on Sep 24, 2014
will a 1.5 cubic feet per sub slot ported box sound good with these owc 304's?
A shopper on Aug 2, 2014
Best Answer: It will sound good for this sub. Just keep in mind, the sub can only handle 175 RMS and the response will not give you the lows a more expensive sub would. You will have to tune the port to about 30 to 35 hz to get good sound out of it. You will get more spl out of a higher tune, but you will lose the musical bass. hope this helps and sorry for the delayed response. Good luck.
Reply · Report · Ryan S on Mar 8, 2015
· Add Answer · I Have This Question Too (0)
What are the actual thiele small parameters of the sub? Manufacturers are known to embellish just a bit. I have no previous experience with this particular manufacturer.
Geoff on Jan 5, 2015
Best Answer: It's a good sub for the money. I have no complaints. I'm running one in a 2.5 cubic foot ported enclosure with 200 watts rms. It's not a competition sub, but a great every day unit. I recommend it for any stock system upgrade or addition.
Reply · Report · Jamie B on Jan 5, 2015
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

OWC304

UPC

806576220732

Weight

8.50lbs

Internal SKU

owc304

Internal Product ID

67862

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: MB Quart OWC304

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